1. Calculate the Hamming codeword for given the data string. You must show your work. 1011011001 2. Given the 12-bit Hamming code below, identify the correct 8-bit memory word it represents. You must show your work. 011011001100 3. Consider a cache memory with an access time of 8 nanoseconds and a hit ratio of 90%. Main memory has an access time of 60 nanoseconds. Calculate the mean access time. 4. How long does it take to read one cylinder with 32 tracks, each containing 1024 sectors? Each track should be read one at a time and starting at sector 0 . The rotation rate is 7200 RPM. Assume that switching between tracks of a cylinder can be done simultaneously and that the read-write head is already positioned at sector 0. 5. A disk has 1024 sectors/track and 4096 bits/sector. Assuming a rotation rate of 10,200 RPM, calculate the sustained transfer rate of the disk over one track. 6. Calculate how much disk space (in whole sectors and tracks) will be required to store 1GB ( 230 bytes) of data if a disk is single-zoned with 512 bytes/sector and 1024 sectors/track. Ignore any file header record(s) and track indices. 7. Blu-ray runs at 4.5MB/sec and has a capacity of 25GB. How long does it take to read the entire disk